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Standard Horizon Receiver MST70 Operating Instructions
Standard Horizon Receiver MST70 Operating Instructions
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MST70 Marine AM/FM Cassette Stereo System With NOAA Weather Owner's Manual Marine Division of Yaesu U.S.A.
TABLE OF CONTENTS
FEATURES............................................................................................1
REPLACEMENT PARTS.......................................................................2
LISTENING TO FM ON YOUR BOAT...................................................2
CASSETTE CARE AND MAINTENANCE.............................................2
REMOVING AND FITTING THE FRONT PANEL.................................3
INSTALLATION.....................................................................................4
Mounting........................................................................................ ..4
Upright or Overhead Mounting...................................................... ..4
Flush Mounting...................................................
..............................5
Electrical Wiring.........................................
......................................7
Speaker Connections........................................
...............................8
Antenna Connections....................................................
...................9
Fuse Replacement....................
........................................................9
CONTROLS...........................................................................................9
OPERATION........................................................................................10
General Functions..........................................................................10
Radio..............................................................................
.................11
Reset..............................................................................................13
Cassette Player..............................
..................................................14
SPECIFICATIONS...............................................................................15
ACCESSORIES...................................................................................16
LIMITED WARRANTY.........................................................................17
MST70 Owner’s Manual Page 1
FEATURES
• Detachable Face Panel: Guards against theft by allowing you to remove
the face panel, rendering the player unusable. A carry case for the
detachable face panel is included.
• All Electronic Controls: The Bass, Treble, Volume, Balance and Fader
functions are all controlled by touch buttons for greater long term reliability.
• 30 Pre-set Memories: Store up to 18 FM and 12 AM stations in memory
for easy recall.
• Auto Pre-set Memory System: Automatically locates and stores local
stations into memory for you.
• Seek and Manual Tuning: Select stations yourself or let your radio find
them for you.
• Local/DX Switch: Adjusts your radio's sensitivity for distant or local
reception when seeking or scanning.
• Backlighting: Special 'night vision' orange back lighting of the display
and all controls.
• Built in Clock: Automatically displays the time when the unit is switched
off, and at the press of a button when using the radio or cassette player.
• FM Stereo/Mono Switch: Lets you manually disable stereo operation for
improved FM reception in weak signal areas.
• RCA Outputs: Provides a separate low level output for connection to
external equalizer/booster-amplifier systems.
• Water Resistant Housing: Built into a special water resistant marine
housing made from corrosion proof materials with a transparent splash-
resistant front cover.
• Hi Output Power: 25 Watts peak to peak output power per channel.
• Large easy to read LCD: Displays station memories, frequency, time and
selected functions.
• NOAA Weather Channels: Fitted with 10 weather channels for instant
access to local weather reports.
Page 4 Owner’s Manual MST70Page 2 Owner’s Manual MST70 REPLACEMENT PARTS PART STANDARD HORIZON PART NUMBER Dust Cover.......................................................................................053002027AFlush Mount Escutcheon.................................................................063002002AMounting Bracket............................................................................160004023AMounting Bracket Knobs.................................................................154011017APower Wire Harness........................................................................156007001ARear Case Assembly......................................................................M32649001ASpeaker Wire Harness.....................................................................156008001A LISTENING TO FM ON YOUR BOAT The majority of FM broadcasts are music programs. Compared with AM signals, FM signals have a wider dynamic range, are relatively immune to noise and provide virtually distortion free music reproduction. However, because of the nature of FM signals and the fact that FM stations are usually positioned for shore base reception, receiving them in a moving boat may be accompanied by problems. • FM programs are broadcast for local reception and cannot be heard at distant locations. To enjoy FM programs at their best, it is important that you tune to a station that is broadcasting locally. • FM signals can reflect from solid objects such as buildings or hills. If these reflected signals are received along with signals arriving directly from the transmitter, they may mix together to produce what is known as 'multipath distortion'. This distortion is heard as noise. Often moving as little as 3 feet from your position will correct this problem. • FM signals travel in straight lines. Because the signals are reflected from or absorbed by large solid objects, a signal 'shadow' may be present behind the object which may result in poor reception in that area. CASSETTE CARE AND MAINTENANCE 1. Tapes no longer than C-90 (90 minutes playing time) are recommended.Avoid using C-120 tapes because they are extremely thin and may jam your cassette player mechanism. 2. The most common cause of poor sound reproduction is a contaminated tape head. Signs of contamination include low volume on one or both channels and failure to produce high frequency notes. The head can be cleaned using a cotton applicator soaked in alcohol. If the cassette unit is used for more than one hour each day, the head should be cleaned once or twice a month.
MST70 Owner’s Manual Page1 REMOVAL AND FITTING THE FACE PANEL Removal Before removing the face panel, turn the unit OFF by pressing the POWER button. 1. Press the release button to release the left-hand end of the face panel. 2. Lift the front panel out towards you. After removing the face panel, place it inside the supplied case to protect it from damage. Do not leave it in a position where it could be exposed to direct sunlight. MST70 Owner’s Manual Page 3 3. To extend the life of your cassettes, keep them away from: • areas exposed to the sun• top of instrument panels• the engine• areas exposed to heat and moisture• magnetic fields (such as speakers) 4. Replace tapes in their plastic cases when not in use. 5. Do not oil revolving parts. ReleaseButtonSEK
Page 4 Owner’s Manual MST70
Refitting
1. Make sure the face panel is the right way up as it cannot be attached upside down.
2. Fit the right-hand end of the face panel into the tabs inside the right-hand end of the unit.
3. Gently press the left-hand end of the face panel into place until it clicks. Only light pressure is required.
INSTALLATION
Mounting
The MST70 is designed to be mounted in several different ways so that it can
be installed in the most convenient position. Although the MST70 is water
resistant when the front cover is closed, care should be taken to locate
it where it will not be subjected to spray or rain. The diagrams below show
the various methods of bracket mounting available.
Overhead Mount
Upright or Overhead Mounting
1. Attach the two gimbal knobs and self-adhesive rubber washers to the
MST70 and slide the unit into the mounting bracket. Ensure the rubber
washers are between the bracket and the radio. Tighten the knobs firmly.
2. Temporarily position the MST70 in the desired location, tilting the radio
in the bracket to ensure you are able to get the required adjustments for
viewing angle etc.
3. Roughly mark the location of the bracket edges, then seperate the radio
from the bracket and reposition the bracket to mark the mounting hole
positions. A range of mounting holes are provided to suit most installations. Upright Mount
MST70 Owner’s Manual Page 5 4. Screw or bolt the bracket into position. The mounting method will depend on the material to which the bracket is being attached. 5. Slide the MST70 back into the bracket slots and adjust to the required position before tightening the gimbal knobs. 6. Connect the antenna lead and electrical wiring as described later. Flush Mounting The MST70 can be neatly flush mounted into a panel or bulkhead so that just the controls and the protective cover are visible. There are two flush mounting options available. The best option for you will depend on your particular situation. • If the space behind the bulkhead or panel you have selected has a suitable support shelf and the area is fully accessible, you can use the supplied escutcheon panel as described later. • If the space behind the bulkhead or panel is largely inaccessible or there is no additional support shelf, we recommend you use the optional CMB60 flush mounting kit (available as an accessory). This kit is more robust, is fully self supporting and allows the MST70 to be installed from the front. Installation using the supplied Escutcheon Panel. 1. Select a suitable location on a panel or bulkhead. Examine behind the bulkhead to determine the best method of support for the unit. 2. Place the escutcheon on the panel or bulkhead in the required position and mark around the outside edge of the escutcheon slot wall. 7.87" 2.76" Using the optionalFlush Mounting Kit Escutcheon IMPORTANT DRAWAROUND THIS EDGE70 mm 200 mm
Page 6 Owner’s Manual MST70 3. Remove the escutcheon and measure the marks. They should measure approximately 7.87'' wide and 2.76'' high. If not, check the diagram above to ensure that you measured the correct edge. 4. If your measurements are correct, carefully cut the slot around the marked lines, ensuring that you maintain the curves in each corner. Mark and drill the four 0.08'' holes in the bulkhead to accept the locating pins at each corner of the escutcheon. 5. Trial fit the escutcheon to ensure it fits securely against the panel. If all is well, place a small dab of glue on each locating pin and press the escutcheon into place. Temporarily hold with tape if necessary. 6. With the escutcheon firmly glued in place, slide the MST70 through the slot from the front and push it all the way in, while leaving a clearance for the front cover to hang in the open position. Open the cover if necessary to ensure the correct clearance . 7. Holding everything in position, mark the location of the internal support bracket(s). Drill the required holes and fit the bracket(s) as required to hold the MST70 firmly in place. Note: If using the perforated metal support strip, mount it to the rear of the MST70 as shown in the diagram below. 8. Complete the antenna lead, speaker and power wiring as described later. Washers Bolt Peforated Strip Escutcheon Mounting BracketOR
MST70 Owner’s Manual Page 7 ELECTRICAL WIRING DC Connections Caution: The MST70 is designed for vessels with a 12 Volt negative ground electrical system only! Referring to the wiring diagram: 1. Connect the Red wire directly to the positive terminal of the vessel’s battery, or to a point which has +12 Volts available at all times. This lead maintains the memories within the MST70 and is the main power source for the unit. 2. Connect the Orange wire to the vessel’s +12V supply via an appropriate isolating switch or circuit breaker. This lead turns the radio ON and OFF. Alternatively, this wire can be connected directly to the battery’s positive terminal and the MST70 switched ON and OFF using it’s own controls. 3. Connect the Black lead labelled ‘GROUND’ to the battery’s negative terminal or to the common negative bus in the electrical system. Important: Your MST70 is able to maintain it’s memories when it is switched off by drawing power directly from your battery via the Red lead. Although the memory backup current is very small (about 7 mA) it may eventually discharge your battery if left connected indefinitely. The time taken to completely discharge External Aux. Switch (Optional) Optional Master Switch Antenna RED ORANGE 10 AMP 1 AMP BLACK MST70GND SEK
Page 8 Owner’s Manual MST70 your battery could vary depending on it’s Amp-hour rating and condition. If you do not run your boat’s motor regularly or your battery is not kept charged between outings (e.g. Solar or wind charger), we recommend you disconnect the Red lead each time you secure your boat. This is easily done by connecting the Red lead via a Master switch which can be switched off after each outing. Speaker Connections When connecting the speakers, observe the correct polarity as shown in the diagram. Incorrect polarity will result in a reduction of Bass response and stereo effect. The use of speakers with an impedance of less that 4 Ohms is not recommended, as they will cause excessive loading of the MST70’s output circuit. Caution: The MST70 is a four speaker system that requires 2 separate wires for each speaker. • DO NOT connect the negative (-ve) terminals of the speaker wires together or ground them to any part of the negative electrical Bus. • DO NOT short the +ve and –ve speaker wires together. Damage caused by the above will not be covered under warranty. Connect all four speakers as shown in the diagram. Adjust the Fader control for the required front/rear balance. If you wish to connect only two speakers, LeftFront MST70 RightFront LeftRear RightRearWhite Left Low Level Output Red Right Low Level Output Grey Grey/Black Brown Brown/Black Green Green/Black Violet Violet/Black+ – + – + – + – SEK